/*
 * Copyright 2020 The Kubernetes Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Tab } from '../webapp/tab'

/** Initialize the session for a given `Tab` */
export type SessionInitializer = (tab: Tab) => void | Promise<void>

/** Session initializer registrants */
const registrar: SessionInitializer[] = []

/** Register one SessionInitializer */
export function registerSessionInitializer(init: SessionInitializer) {
  registrar.push(init)
}

/** Invoke each registered session initializer on the given tab */
export default async function MapTo(tab: Tab): Promise<void> {
  await Promise.all(registrar.map(_ => _(tab)))
}
